The comment said your system has a bug as in it malfunctions and decides to shoot the coin anyways, and his other point was you will be looking at the coin wide eyed so perfect chance for a reflected laser to hit you in the eye if by chance the correct angle happens to line up and send it back to your eye. Also, I've seen too much unbelievable stuff actually happen so nothing is unbelievable in 2022. Yes we are talking highly unprobeable but with 7 billion people on earth we have to account for the unprobeable to happen.